一いっ寸すんの光こう陰いん軽かろんずべからず

expression

every moment is precious; make hay while the sun shines

A classical proverb urging not to waste even a moment of time. Often used in formal or literary contexts.

• 「一いっ寸すんの光こう陰いん軽かろんずべからず」という言こと葉ばを胸むねに刻きざんで勉べん強きょうに励はげんだ。

  I studied hard, keeping the proverb 'every moment is precious' in mind.